Aspectos morfológicos e ultraestruturais de Mixosporidiose e Coccidiose em cichla temensis Humboldt, 1821, (Osteichthyes: Cichlidae) oriundo do município de Cametá/PA.

Abstract

The present study reports on aspects of light microscopy and transmission electron of a mixosporidio and a coccidian parasite found in gill and liver, respectively, teleost fish Cichla temensis (Humboldt, 1821), collected the Tocantins River, near to Cameta, State Pará, Brazil. The prevalence of infection was 60% for both mixosporidiose, as for coccidiosis. In mixosporidiose cysts containing spores were located in gill lamellae with oval and whitish. The spores had a total length of 42.3 ± 0.65 pm ; fusiform body measuring 12.8 ± 0.42 pm in length and 8.6 ± 0.32 pm in width, each of the two valves presented a tapering tail measuring 29, 5 ±0.73 pm. The spores had two polar capsules with 7.4 ±0.16 pm in length and 2.6 ± 0.08 pm in width, containing a polar filament with 5-7 turns. This is a table with the measurements of spores of Henneguya in Brazil, being compared in this work. The spores are different from previously described species. Based on spore morphology, it is concluded that this species belongs to the family Myxobolidae, genus Henneguya, and constitutes a new species: H. temensis sp. In coccidiosis, oocysts were scattered throughout the liver parenchyma, and according to the morphology observed under light microscopy (oocyst containing 4 espocistos, each with 2 sporozoites), it is concluded that this species belongs to the family Calyptosporidae, gender Calyptospora. These data allow us to describe a new host for Henneguya and Calyptospora, and describe a new species of mixosporidio in Cichla temensis.